人工林落叶松生长轮宽度年表的建立

Tree-ring Width Chronologies of Larix gmelinii Plantations

以东北地区人工林长白落叶松为研究对象,论述了合理建立其生长轮宽度年表的方法。根据人工林落叶松生长时受多种因素影响的特点,提出采用线性回归方法提取生长趋势,采用滤波方法消除培育措施产生的影响,采用算术平均的方法消除立地条件的影响,建立其生长轮宽度年表。相关分析表明,运用此方法建立的年表科学、合理,可以进行年轮气候学分析。根据多元回归分析的判定系数定量分析了不同因素对人工林落叶松生长轮宽度径向变异的影响程度,结果表明,生长轮宽度径向变异的40%左右是由气候因素引起的,30%左右是由遗传因素引起的,约20%是由培育措施引起的,仅有10%左右是由立地条件和其它未知因素引起。

The reasonable methods were developed for establishing tree-ring width chronologies of Larix gmelinii （larch） plantations in Northeast China. Aiming at the effects of various factors on larch growth, the linear regression method was used to fit the growing tendency, the method of Daubechies filter to extract the influence of silviculture, and the arithmetic mean method to eliminate the influence of site conditions. The correlation analysis shows that the established chronology is more scientific and reasonable, which can be applied in dendroclimatic analysis. The effects of various factors on the radial variation of growth ring width of larch wood were analysed quantificationally by the judgment coefficients in multiple regression analysis. Results show that about 40% of the variance of growth ring width is caused by climate change, about 30% by inheritance, about 20% by silviculture, and about 10% by site conditions and other factors.